Boiler furnace



` April 23, 1935. v M. KUHNER v 1,998,510

BOILER FURNACE Filed Sept. 23, 1952 @000000000000 ,l 0909090000000, @GoooeoooeooG//l lNvNToR ATTORNEY Patented Apr. 23, 1935 UNITED STATE-S BOILER FURNACE .Max H. Kuhner, Wgres'ter, lMass., assignor -to RileyStokerCozr-poration, Worcester, Mass., a corporationnf Massachusetts Applicationlseptemberf23,1332, Serial No; ,634,576

.5 Claims.

This invention relates yto boiler furnaces, and more particularly to the construction andarrangement oi a pair of boilers-mountedabove-a common furnace chamber.

Steam boilers are frequently mounted ina battery, that is, the boilers are sidebyside, and -a central `or battery `wall separates the respective furnace chambers. Such boilers are usually equipped with stokers yor Vw-ith grates -adaptedior hand-firing. When it Iis desired 'to --rnodernize steam generating equipment of this type landto utilize pulverized coal as the 4vfuel, itis ordinari-ly found that the furnace chambers are too narrow t give satisfactory results.

'This difficulty can vbe met by removing the lower portion of the battery wall, thus providinga single large furnace chamber for the twofboilers. However, the lupper portion -of the batteryswall-imust be `retained to prevent short circuiting' -of the hot gases through the space between theboilers. As yet, no satisfactory oonstruction'lhas been proposed for supporting this wall. Y

Itis accordingly the main object of the present invention to provide a simple, Vpractical andfinexpensive construction for supportingla wall-ibetween a .pair of boilers, wherebyIboth-boilers may .be heated by vmeans of .gases ff-rom a :common furnace .chamber therebeneath.

It is a furtherobjectof Ytheinvention .to rprov-ide a simple :and durable construction which will allow the lower portion .of rthe'ibattery wall iin a battery setting to be removed, ythus lforming a single large furnace ychamber .in Lwhich.pulverir/ied coal maybe burned .in suspension.

"With these 4and other objects in view, vas will be apparent to .thoseski'lled in .the art, fthe invention residesin the ycombinationof v--parts set forth inthe speciiication `and-covered lby the claims appended hereto.

In accordance with the invention, lthe upper portion of the'battery wall is supported cna beam which extends from front to rear vbetween-the boilers. This beam ispreferably'hollow, and may be cooled "by Athe circulation V of Watertllerefurnace; the seetonbeins taken substentiallypn thelineI--I ofFig. 3; Y

Fief2 iS a .section en the line 2-2 .0f Fig. ,1.a portion 'beine lerokren away for clearness of .illustration'; and

Fig-3 isa seetien'en the line .3-13 ,of Fie-J.

f the Yjd.reWins ,I .have ,illustrated .W0 .Steam boilers O f, the .wellelsnown .Badenhausen type mountedside' by side .above .afurnaeecbamber I0. The furnace ebamber is proyded with .einem wall 4I I, Ya rear .wall I2, l`and two side walls I4. A battery-wall I5 jspositigned between the ,boilers and'extenols longitudinally thereof. y

,.Eeeh belereomprises arear .Meter .drumd abOS/elthe rear Weill I2, a .front-.water ,drum jIl! abovethefrontwall -I I, and a steam land .Water drum'iIrS aboverthe regar drum .Ili. ,These v,drums are an arranged transversely-.of the furnace chamber 1,0, and they are connected by three banks of Water tubes t0-.form a .eomnlete .tireulating system. As illustlated, tube bank 2 I slopes upwardly and'forwardly between .drums ,l5 and I8, tube v4bank 22 slopes. upwardly and rearwardly bet-Ween drums 'I8 arditi, and tube .bank .eX- tends substantially vertically `between .drums V,I9 anduIlB. A steam drum is mounted above the front-water drum I8, and ia row @substantially horizontal'tubes 26 leads from :the s teamrand water drinnv Ii@ -to the steamY drum. "I hese tubes 216 support refractory :material 2l which Yf or n 1ffs Ka roof for the boiler. -wall f2?. is Iprovide'd-1in the rearfof thetubebank 23and a gas outlet 3 0, is vlocatedbetween the vupperjportipn of this kwall and .thesteam and `water drum ;I9. Baillesl direct theuhotgasesrrom the-furnace chamber I 0 successively over `the tube banks 2 I, 22 and2'3 to thecutletll. VThis generates steam whichis des livered'to thesteamand water drumel 9 and then flows :throughthe tub es 126 -to the 'steam drumj=25.

Infa, boiler rfurnace-:oi `this type, -the battery wall I5 .ordinarily extends downwardly and xlivides :the space beneath 'thelboilersintotwo entirely .separate furnace chambers, neither of whichislofesufcient width lforsatisfvactory operation with pulverized coal. In order -that pulveri'zed'coalvmaybe usedasa duel, Ilhavef-remved the lower portion of the battery wall, thus forming a single combustion chamber of ample width. The upper portion I5 of the battery Wall is retained to prevent the hot gases from iiowing through the space between the boilers instead of through the tube banks.

In the embodiment illustrated I have arranged to support the wall I5 by means of a hollow beam 33, rectangular in cross-section, which extends from front to rear between the two boilers. The ends of this beam extend outside the furnace walls and rest upon transverse beams 34 which are supported by the boiler columns 35. Other suitable means may be provided for supporting the ends of the beam 33. This beam 33 preferably slopes upwardly at a slight angle toward the front, and it is shown connected into the circulation of both the boilers. For this purpose, tubes 31 connect both the drums I 6 with the lower end of the beam, and tubes 38 connect both the drums I8 with the upper end of the beam. A drain pipe 39 is preferably provided at the lower end of the beam, and handhole caps 4I are providedat each end of the beam. Small angles. 42 are welded or otherwise secured to the upper-surface of the' beam to form lugs which assist in anchoring the wall I5 thereon. It will be noted that the beam 33 extends above the drums I 6 and below the drums I8. ,l

In order to prevent gases from flowing from the furnace chamber rearwardly beneath the beam 33, a small brick pier 43 is constructed in front of the drums I6 and between the rear portions of the tube banks 2|. This pier 43 extends upwardly to the lower surface ofthe `beam 33.

When the beam 33 is installed, it will be possible in somecases to shore up the upper portion of the existing battery wall. In other cases, it will be easier to remove the entire battery wall, and after the beam is installed build a new wall on top of the beam. `It is immaterial, so far as the present invention is concerned, which of these methods is followed.

The operation of the invention will now be apparent from the above disclosure. Pulverized coal or a similar fuel is burned in suspension in the furnace chamber I0, which is of suflicient width to avoid flame impingement on the side walls. The hot gaseous products of combustion are divided above the furnace chamber by the pier 43, beam 33 and wall I5, and these gases flow in contact with the boiler tubes, thus generating steam. The beam 33 forms a strong, simple and relatively inexpensive support for the wall I5. Water flows from the drums I6 through the tubes 31 into the lower end of the beam 33, and then upwardly and forwardly along the beam. The water, together with any steam generated in the beam, ilows fromthe upper end of the beaml through the tubes l38 into the drums I8. This continuous circulation of water through the beam prevents any possibility of overheating thereof. Furthermore, the lbeam protects the refractory wall I5 from the direct impingement of the hot gases.

It will be apparent that I have provided a simple and practical means whereby two boilers, originally set in a battery with separate furnace chambers, may be arranged to be red from a single large furnace chamber. The invention, Pin its broader aspects, is susceptible of considerable change in its mode of application, and may be used with boilers of various types differing from those illustrated.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A boiler furnace comprising walls forming a furnace chamber, two boilers mounted side by side above the furnace chamber, each boiler having a transverse lower drum at the rear, a transverse upper drum at the front, and a bank of tubes connecting the drums, a hollow beam extending above the rear drums and beneath the front drums, said beam being located between the boilers and sloping upwardly toward the front, a water flow connection between one lower drum and the rear end of the beam, a water flow connection between one upper drum and the front end of the beam, and a battery wall above and supported by the beam.

2. A boiler furnace comprising walls forming a furnace chamber, two boilers mounted side by side above the furnace chamber, a battery wall extending longitudinally between the boilers, a hollow beam extending above the furnace chamber and beneath the battery wall to support the same, the ends of the beam extending outside the furnace walls, means to support the ends kof the beam, and means to circulate water through the beam.

3. A boiler furnace comprising walls forming a furnace chamber, two boilers mounted side by side above the furnace chamber, each boiler having a transverse lower drum at the rear, a transverse upper drum at the front, and a bank of tubes connecting the drums, a hollow beam extending above the rear drums and beneath the front drums, said beam being located between the boilers 'and sloping upwardly toward the front, a water flow connection between one lower drum and the rear end of the beam, a water flow connection between one upper drum and the front end of the beam, a battery wall above and supported by the beam, and means to prevent gases from flowing rearwardly from the furnace chamber between the beam and the lower drums.

4. A boiler furnace comprising walls forming a furnace chamber, two boilers mounted side by side above the furnace chamber, a hollow beam located above the furnace chamber and between the boilers, the ends of the beam extending beyond the walls of the furnace chamber, supporting means for the ends of the beam, means to circulate water through the beam, and a battery walll above and supported by the beam.

5. A boiler furnace comprising walls forming a furnace chamber, two boilers mounted side by side above the furnace chamber and each having a bank of tubes which slopes upwardly toward the front of the furnace chamber, the furnace chamber extending throughout substantially the entire length of the banks of tubes, a hollow beam located above the furnace chamber and between the boilers, the beam sloping upwardly toward the front of the furnace chamber, means connecting-the ends of the beam with the interior of one of the boilers, and a battery wall above and supported by the beam.

MAX H. KUHNER. 

